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Need help in comparing two files using shell or Perl

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# 1  
Old 07-11-2013
Need help in comparing two files using shell or Perl
I have these two file that I am trying to compare using shell arrays. I need to find out the changed or the missing
enteries from File2. For example. The line "f nsd1" in file2 is different from file1 and the line "g nsd6" is missing
from file2.

I dont want to use "for loop" because my files have atleast 2000 lines so it will take a long time for comparison.

I guess shell arrays or Perl should be able to do it faster. Any help would be highly appreciated.


Code:
cat file1
a nsd1
b nsd1
c nsd2
d nds3
e nsd6
f nsd2
g nsd6

Code:
cat file2
a nsd1
b nsd1
c nsd2
d nds3
e nsd6
f nsd1

# 2  
Old 07-11-2013
Why not use the commands diff or sdiff?
# 3  
Old 07-11-2013
This is not the actual file, its just a test file, the actual file cannot be sorted out....
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